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  <title>尝试加载未定义的类</title>
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  <div id="layout-content"><div id="function.autoload" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">__autoload</h1>
  <p class="verinfo">(PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">__autoload</span> &mdash; <span class="dc-title">尝试加载未定义的类</span></p>

 </div>

 <div id="function.autoload-refsynopsisdiv">
  <div class="warning"><strong class="warning">Warning</strong><p class="simpara">This feature has been
<em class="emphasis">DEPRECATED</em> as of PHP 7.2.0. Relying on this feature
is highly discouraged.</p></div>
 </div>

 <div class="refsect1 description" id="refsect1-function.autoload-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>__autoload</strong></span>
    ( <span class="methodparam"><span class="type">string</span> <code class="parameter">$class</code></span>
   ) : <span class="type"><span class="type void">void</span></span></div>

  <p class="para rdfs-comment">
   你可以通过定义这个函数来启用<a href="language.oop5.autoload.html" class="link">类的自动加载</a>。
  </p>

 </div>


 <div class="refsect1 parameters" id="refsect1-function.autoload-parameters">
  <h3 class="title">参数</h3>
  <dl>

   
    <dt>
<code class="parameter">class</code></dt>

    <dd>

     <p class="para">
      待加载的类名。
     </p>
    </dd>

   
  </dl>

 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.autoload-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   没有返回值。
  </p>
 </div>


 <div class="refsect1 seealso" id="refsect1-function.autoload-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="spl_autoload_register.html" class="function" rel="rdfs-seeAlso">spl_autoload_register()</a> - 注册给定的函数作为 __autoload 的实现</span></li>
   </ul>
  </p>
 </div>


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